The M-D Aluminum Concealed Screw-on Under Door Seal features a vinyl seal for protection from drafts, moisture, dust and insects. Save on the energy by sealing the bottom of the door and keeping the heat or air conditioning from escaping. This product requires a kerf channel on the bottom of the door. It is less visible than most Under Door Seals and is ideal for a more concealed look. This seal requires removal of the door to install on the bottom of the door. Before installation, cut to desired length by using a hacksaw.